On one hand (heh) there's apparently evidence to suggest that handwriting activates parts of the brain which aren't typically activated by just typing something out. I can see how that would be the case and why it could sometimes be useful.
On the other, the idea of carrying a little notebook around to jot things down when I have a phone in my pocket, or using a fountain pen for longform text (trust me it would actually help you avoid hand cramps, aside from being less wasteful) all comes across as... intentionally inefficient? I struggle to see intentional inefficiency as anything but pretension. Like it's all just fetishizing living a more analogue life.
It actually makes the techbro in me think there's something to companies like Supernote and Boox and ReMarkable making e-ink tables that exist mainly so that what you do choose to write by hand can be digitized, stored and made searchable.
I suppose that's actually exactly why people tend to journal in physical notebooks? Because what you put down in there will just disappear unless you crack open that notebook again.
...Meanwhile I'm pretty sure a lot of people feel that writing things by hand gets their creative juices flowing. That's sort of interesting to me, because personally, by the time I'm finished writing a single sentence whatever I was thinking about is halfway gone. If I don't get it down real quick my thoughts will drift to something else entirely, so when I had to handwrite essays in primary school I'd get completely stuck in a way I never do just typing things.
TL;DR someone who's bad at empathy talks about handwriting as if everyone else experiences the world exactly the same way, please knock him off of his stupid pedestal
I am quite sure I have ADHD (though not officially diagnosed), with that in mind here's my story.
There's a veritable cornucopia of programs and systems available to utilize when it comes to keeping digital notes, and none of them stick for me. I desperately want them to work, because I loathe writing things by hand due to hand cramps and poor penmanship. The thing I get hung up on a lot is getting comfortable in a certain software-based note-taking ecosystem and then running straight into a wall when I want it to do one particular thing I've identified as being useful, or perhaps the software just becomes unreliable for one reason or another. It's highly demotivating to me when I realize I've spent hours using something only for it to end up not working for me the way I wanted it to. Also, when I write digital notes, I have a very bad habit of editing, as if someone other than myself were to read my notes later (irrational, I know), so the process takes much longer than if I were to put the pen to paper.
The thing about pen and paper is, it just works. I might run out of paper or ink, but assuming I have access to more, I can write whatever and however I want. Sure, I don't get automation or full-text search "out of the box", but I can devise my own systems (short-hand, indexing, etc.) or borrow someone else's (Bullet Journal), even use external tools (scan document | OCR) to meet my needs when the time comes.
Right now I'm in the middle of building a habit of keeping a small journal on my person where I keep very simple remarks about my day and track personal tasks and events. I'm explicitly only using systems that I find useful and nearly effortless, but as I improve the habit I will try adding more complexity. I feel that if I can develop a solid core of analog writing, then it's likely I can begin to introduce more regular digital note-taking to augment this core practice.
I don't believe there is one method that works (or is even beneficial) for everyone, rather I think it's more important for individuals to find a method (or hybrid) that works for them, and stick to it.